drivers/net/atlx/atlx.c

   1 /* atlx.c -- common functions for Attansic network drivers
   2  *
   3  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   4  * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
   5  * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
   6  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   7  *
   8  * Derived from Intel e1000 driver
   9  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  * more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along with
  22  * this program; if not, write to the Free Software Foundation, Inc., 59
  23  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  */
  25
  26 /* Including this file like a header is a temporary hack, I promise. -- CHS */
  27 #ifndef ATLX_C
  28 #define ATLX_C
  29
  30 #include <linux/device.h>
  31 #include <linux/errno.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/if.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/socket.h>
  36 #include <linux/sockios.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/string.h>
  39 #include <linux/types.h>
  40 #include <linux/workqueue.h>
  41
  42 #include "atlx.h"
  43
  44 static struct atlx_spi_flash_dev flash_table[] = {
  45 /*      MFR_NAME  WRSR  READ  PRGM  WREN  WRDI  RDSR  RDID  SEC_ERS CHIP_ERS */
  46         {"Atmel", 0x00, 0x03, 0x02, 0x06, 0x04, 0x05, 0x15, 0x52,   0x62},
  47         {"SST",   0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0x90, 0x20,   0x60},
  48         {"ST",    0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0xAB, 0xD8,   0xC7},
  49 };
  50
  51 static int atlx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  52 {
  53         switch (cmd) {
  54         case SIOCGMIIPHY:
  55         case SIOCGMIIREG:
  56         case SIOCSMIIREG:
  57                 return atlx_mii_ioctl(netdev, ifr, cmd);
  58         default:
  59                 return -EOPNOTSUPP;
  60         }
  61 }
  62
  63 /*
  64  * atlx_set_mac - Change the Ethernet Address of the NIC
  65  * @netdev: network interface device structure
  66  * @p: pointer to an address structure
  67  *
  68  * Returns 0 on success, negative on failure
  69  */
  70 static int atlx_set_mac(struct net_device *netdev, void *p)
  71 {
  72         struct atlx_adapter *adapter = netdev_priv(netdev);
  73         struct sockaddr *addr = p;
  74
  75         if (netif_running(netdev))
  76                 return -EBUSY;
  77
  78         if (!is_valid_ether_addr(addr->sa_data))
  79                 return -EADDRNOTAVAIL;
  80
  81         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
  82         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
  83
  84         atlx_set_mac_addr(&adapter->hw);
  85         return 0;
  86 }
  87
  88 static void atlx_check_for_link(struct atlx_adapter *adapter)
  89 {
  90         struct net_device *netdev = adapter->netdev;
  91         u16 phy_data = 0;
  92
  93         spin_lock(&adapter->lock);
  94         adapter->phy_timer_pending = false;
  95         atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
  96         atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
  97         spin_unlock(&adapter->lock);
  98
  99         /* notify upper layer link down ASAP */
 100         if (!(phy_data & BMSR_LSTATUS)) {
 101                 /* Link Down */
 102                 if (netif_carrier_ok(netdev)) {
 103                         /* old link state: Up */
 104                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 105                                 netdev->name);
 106                         adapter->link_speed = SPEED_0;
 107                         netif_carrier_off(netdev);
 108                 }
 109         }
 110         schedule_work(&adapter->link_chg_task);
 111 }
 112
 113 /*
 114  * atlx_set_multi - Multicast and Promiscuous mode set
 115  * @netdev: network interface device structure
 116  *
 117  * The set_multi entry point is called whenever the multicast address
 118  * list or the network interface flags are updated.  This routine is
 119  * responsible for configuring the hardware for proper multicast,
 120  * promiscuous mode, and all-multi behavior.
 121  */
 122 static void atlx_set_multi(struct net_device *netdev)
 123 {
 124         struct atlx_adapter *adapter = netdev_priv(netdev);
 125         struct atlx_hw *hw = &adapter->hw;
 126         struct dev_mc_list *mc_ptr;
 127         u32 rctl;
 128         u32 hash_value;
 129
 130         /* Check for Promiscuous and All Multicast modes */
 131         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 132         if (netdev->flags & IFF_PROMISC)
 133                 rctl |= MAC_CTRL_PROMIS_EN;
 134         else if (netdev->flags & IFF_ALLMULTI) {
 135                 rctl |= MAC_CTRL_MC_ALL_EN;
 136                 rctl &= ~MAC_CTRL_PROMIS_EN;
 137         } else
 138                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 139
 140         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 141
 142         /* clear the old settings from the multicast hash table */
 143         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 144         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 145
 146         /* compute mc addresses' hash value ,and put it into hash table */
 147         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 148                 hash_value = atlx_hash_mc_addr(hw, mc_ptr->dmi_addr);
 149                 atlx_hash_set(hw, hash_value);
 150         }
 151 }
 152
 153 /*
 154  * atlx_irq_enable - Enable default interrupt generation settings
 155  * @adapter: board private structure
 156  */
 157 static void atlx_irq_enable(struct atlx_adapter *adapter)
 158 {
 159         iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 160         ioread32(adapter->hw.hw_addr + REG_IMR);
 161 }
 162
 163 /*
 164  * atlx_irq_disable - Mask off interrupt generation on the NIC
 165  * @adapter: board private structure
 166  */
 167 static void atlx_irq_disable(struct atlx_adapter *adapter)
 168 {
 169         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 170         ioread32(adapter->hw.hw_addr + REG_IMR);
 171         synchronize_irq(adapter->pdev->irq);
 172 }
 173
 174 static void atlx_clear_phy_int(struct atlx_adapter *adapter)
 175 {
 176         u16 phy_data;
 177         unsigned long flags;
 178
 179         spin_lock_irqsave(&adapter->lock, flags);
 180         atlx_read_phy_reg(&adapter->hw, 19, &phy_data);
 181         spin_unlock_irqrestore(&adapter->lock, flags);
 182 }
 183
 184 /*
 185  * atlx_tx_timeout - Respond to a Tx Hang
 186  * @netdev: network interface device structure
 187  */
 188 static void atlx_tx_timeout(struct net_device *netdev)
 189 {
 190         struct atlx_adapter *adapter = netdev_priv(netdev);
 191         /* Do the reset outside of interrupt context */
 192         schedule_work(&adapter->tx_timeout_task);
 193 }
 194
 195 /*
 196  * atlx_link_chg_task - deal with link change event Out of interrupt context
 197  */
 198 static void atlx_link_chg_task(struct work_struct *work)
 199 {
 200         struct atlx_adapter *adapter;
 201         unsigned long flags;
 202
 203         adapter = container_of(work, struct atlx_adapter, link_chg_task);
 204
 205         spin_lock_irqsave(&adapter->lock, flags);
 206         atlx_check_link(adapter);
 207         spin_unlock_irqrestore(&adapter->lock, flags);
 208 }
 209
 210 static void atlx_vlan_rx_register(struct net_device *netdev,
 211         struct vlan_group *grp)
 212 {
 213         struct atlx_adapter *adapter = netdev_priv(netdev);
 214         unsigned long flags;
 215         u32 ctrl;
 216
 217         spin_lock_irqsave(&adapter->lock, flags);
 218         /* atlx_irq_disable(adapter); FIXME: confirm/remove */
 219         adapter->vlgrp = grp;
 220
 221         if (grp) {
 222                 /* enable VLAN tag insert/strip */
 223                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
 224                 ctrl |= MAC_CTRL_RMV_VLAN;
 225                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
 226         } else {
 227                 /* disable VLAN tag insert/strip */
 228                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
 229                 ctrl &= ~MAC_CTRL_RMV_VLAN;
 230                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
 231         }
 232
 233         /* atlx_irq_enable(adapter); FIXME */
 234         spin_unlock_irqrestore(&adapter->lock, flags);
 235 }
 236
 237 static void atlx_restore_vlan(struct atlx_adapter *adapter)
 238 {
 239         atlx_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 240 }
 241
 242 #endif /* ATLX_C */